TUBE TECH: How to Set-Up and Configure an Eliseo TubeGun

This 2010 story is reprinted at readers’ request.
In the past few years, tubeguns have really taken over in high power circles. At most matches you’ll see more tubeguns than conventional prone rifles, and a high percentage of those tubeguns will have been built using an Eliseo (Competition Machine) CSS chassis kit.

Step-By-Step Guide to Stock Set-Up
If you are a new tubegun shooter, or if you are planning a tubegun build this winter, our friend “GS Arizona” has prepared a comprehensive set-up guide for Eliseo tubeguns. Eliseo’s CSS chassis system affords a myriad of adjustments. Initially, one can be overwhelmed by all the variables: Length of Pull, Length to Sights, Length to Handstop, Cheekpad Height, Buttstock Offset, Buttstock Cant Angle, Handstop Angle, and Forearm Rotation.

In his Guide to Configuring the Eliseo Tubegun, GS Arizona shows how to adjust the Tubegun so that a shooter’s prone position is stable, repeatable, and comfortable. The article covers each adjustment, step by step. If you follow the instructions, starting with setting Length of Pull, you should find that your hold becomes more stable, the gun moves less from shot to shot, and your eye position relative to the sights is improved.

About the Set-Up: “Adjusting the stock is a process that you must work at and it builds on itself. As you get one adjustment right, the others begin to fall into place. Our hope is that you take from this article a system for adjusting the stock, not an exact set of dimensions; and that you understand that it will take continuous work over a period of time to really refine the adjustments. Your goal is not to obtain a ‘perfect set of dimensions’ but rather a perfect feel that accomplishes the three objectives of stability, durability and comfort and the knowledge of how to change the adjustments to achieve those objectives under varying conditions such as sloped firing lines or other terrain features.”